- Micaela Mascha
- Micah Miles
- Michael & Michael Hair
- Michael Best
- Michael David Klingenberger
- Michael Dimaggio
- Michael Dimaggio
- Michael Dimaggio
- Michael Kors
- Michael Mccafrey
- Michael Scott Montana
- Michael Thomas Jr
- Michael Walters Advertising
- Mid-america Carpenters Regional Council
- Midas Auto Service Experts
- Midland Indust
- Midway Wholesalers
- Midwestern Group LLC
- Mike Ditka's Restaurant
- Mila's Advanced Skin Care INC.
- Milani
- Mile Stone Crystals
- Milk + Honey
- Millenium Cleaners
- Millennial Design Group-bac
- Millennial Mart
- Millennium Knickerbocker Hotel-nix
- Mimi's Kimbap LLC
- Mindset Creative LLC
- Minghin Streeterville
- Minko Pet LLC
- Minor Major Entertainment
- Mira Couture
- Mirai Sushi Gold Coast
- Mirasa
- Mireille's Studio
- Miriam Dubinsky
- Mist
- Mitchell Gold + Bob Williams
- Mitigation Professionals INC.
- Mixed Greens
- Mk Communications INC
- Mm. Lafleur INC.
- Mnphotostudios LLC
- Mo Dearborn, LLC
- Mobil
- Mobil
- Mobili Mobel
- Modani Chicago LLC
- Mode Project
- Modern Wellness
- Moderne Living
- Modshop
- Moe's Cantina
- Mogadishu Restaurant INC.
- Mohop
- Mojo 330 N Wabash
- Molas4u
- Molly's Cupcakes River East
- Mom's Place - A Chicago Gathering Spot
- Momentum Group
- Momentum-na, INC.
- Momo Factory
- Mon Reve
- Monarch & Lion
- Monarch Catering Company
- Moncler
- Mongerson Gallery, INC.
- Monicare Nannies And Household Staffing, INC.
- Monique Cooper
- Monster Mop
- Montauk Chicago INC.
- Montgomery Cleaners
- Mood Nails
- Moore Poppin
- Moose Knuckles
- Moose Knuckles
- Moreish LLC
- Morgan Hooper
- Morgan, Birge & Associates INC
- Morrison Management Specialsts
- Morton's Of Chicago
- Motel Bar Chicago & Monty's Chicago
- Mother Hubbards
- Mother's First Venture LTD
- Mother's Too
- Moti Cafe
- Motorola Mobility LLC
- Move App Studio
- Move Sales, INC.
- Movement Lincoln Park
- Movement Med
- Moxy
- Mp Factor LLC
- Mr Beef
- Mr. J's
- Mr. Rooter Plumbing Of Lincoln Park
- Msc Carpentry
- Msds LLC
- Mtn Logistics
- Mts-mm LLC
- Muah Cotton Candy
- Mudbum
- Mulberry Marketing Communications
- Multi Latino Marketing Agency, INC
- Murasaki
- Museum Of Ice Cream
- Musick
- Mustard Seed
- Mworks Worldwide, INC.
- My Parking
- Myeyedr.
- Myplanet Living Center LLC
- Myraj
- Mythical Smokes
- N/a
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- N1 Athletics
- Nabeel Yaseen
- Nafari Moda LLC
- Naia Restaurant & Kafe Mera
- Nail Perfection & Foot Spa
- Nailacarte - River North
- Nailacarte Streeterville LLC
- Nails By Bobbie
- Nails By Liz INC
- Nailtastic
- Nailtastic2
- Naked Fries
- Naked Voices, INC.
- Nan Xiang Soup Dumplings
- Nancy Angelair
- Nando's Peri-peri
- Nando's Peri-peri
- Nari Beauty LLC
- Nat Tab LLC
- Nate Berkus Associates, INC.
- Nate Berkus Entertainment
- Nate Berkus Media
- Nathalie Loma
- Nathan Koenig
- National Association Of Realtors
- National Cable Communications
- National Collegiate Scouting Association, LLC
- National Headache Foundation
- National Shrine Of Saint Frances Xavier Cabrini, INC.
- National Student Leadership Conference
- Natural Thai Bodywork
- Navy Pier
- Nbm Development LLC
- Ncr Corporation
- Ncr Parking Management LLC
- Near East Resources
- Near North Animal Hospital LTD
- Near The Pier Development Cntr
- Neat & Naked, LLC
- Nederlander National Markets, LLC
- Neiman Marcus
- Nela Navarrine
- Nelson Smith
- Neon And Light Museum
- Nepal House
- Nerdstogo Ntg10049
- Netsync Network Solutions INC
- New Age Nail Studio
- New Age Nail Studio
- New Age Nail Studio
- New Age Technology Construction Company
- New City Halsted Pharmacy
- New Cleaners
- New Creation Coaching, LLC
- New Image Works
- New Life Design Tthomas Elias Lockhart Iii
- New Link Access Corp
- New Mark Twain, LLC
- New Music School
- New Sterling Cleaners
- New Zaiqa
- Newberry Library
- Newport Capital Partners
- Newsmark, INC.
- Next Level Consultants INC
- Next Level Valet Parking
- Nextech Energy Systems
- Nic & Junior's
- Nice Ice Chicago LLC
- Nicholas Clarke
- Nicholas Joseph Custom Tailors
- Nicole Genovese
- Nicole Westin
- Nicolia L Moore
- Nike Town
- Niki Lee Shipman LLC